| 摘要 |
The invention relates to a tree felling unit of the type at which a frame supports arms for pressing the tree stem against a stop member on the frame, whereafter cutting is effected by means of a cutting device supported by the frame. The invention shows the improvement that the cutting device is an endless saw chain driven along a guiding edge of a disc slidable along a straight track in the frame and drivable against the tree stem with the guiding disc edge facing the stem. Hereby a unit is obtained having the advantages of the shear knife, such as compact dimensions and directed felling effect, but not its disadvantages, such as damages on the surface wood and requirements on a very high driving effect.
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